Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2017

Schedule Of Defined Benefit Plans Disclosures

The following table presents information relating to the Pension Plans:



	Pension benefits as of December 31,
	2017			2016
	(In Thousands)
Change in benefit obligation:
Projected benefit obligation at January 1	$	731,825		$	723,887
Service cost	7,344			7,018
Interest cost	25,305			25,815
Actuarial loss	52,451			9,718
Amendments (primarily increases in pension bands)	900			—
Settlements	(266		)	—
Benefits paid	(35,451		)	(34,613		)
Projected benefit obligation at December 31	782,108			731,825
Change in plan assets:
Fair value of plan assets at January 1	674,430			647,573
Actual return on plan assets	93,022			45,520
Employer contributions	7,212			15,950
Settlements	(266		)	—
Benefits paid	(35,451		)	(34,613		)
Fair value of plan assets at December 31	738,947			674,430
Unfunded status	$	(43,161	)	$	(57,395	)
Amounts recognized in the statement of financial position:
Noncurrent liabilities	$	(43,161	)	$	(57,395	)
Net amount recognized at end of year	$	(43,161	)	$	(57,395	)
Sources of change in regulatory assets ⁽¹⁾:
Prior service cost arising during period	$	900		$	—
Net loss arising during period	4,101			7,690
Amortization of prior service cost	(4,240		)	(5,183		)
Amortization of loss	(13,341		)	(13,896		)
Total recognized in regulatory assets ⁽¹⁾	$	(12,580	)	$	(11,389	)
Amounts included in regulatory assets ⁽¹⁾:
Net loss	$	193,807		$	203,047
Prior service cost	17,318			20,658
Total amounts included in regulatory assets	$	211,125		$	223,705

(1) Represents amounts included in regulatory assets yet to be recognized as components of net prepaid (accrued) benefit costs.

Information For Pension Plans With A Benefit Obligation In Excess Of Plan Assets



	Pension benefits as of December 31,
	2017		2016
	(In Thousands)
Benefit obligation	$	782,108	$	731,825
Plan assets	738,947		674,430
Benefit obligation in excess of plan assets	$	43,161	$	57,395

Information For Pension Plans With An Accumulated Benefit Obligation In Excess Of Plan Assets



	Pension benefits as of December 31,
	2017		2016
	(In Thousands)
Accumulated benefit obligation	$	769,678	$	720,901
Plan assets	738,947		674,430
Accumulated benefit obligation in excess of plan assets	$	30,731	$	46,471

Schedule Of Net Periodic Benefit Costs



	Pension benefits for years ended December 31,
	2017			2016				2015
	(In Thousands)
Components of net periodic benefit cost:
Service cost	$	7,344		$	7,018			$	8,314
Interest cost	25,305			25,815				29,638
Expected return on plan assets	(44,672		)	(43,492		)		(44,819		)
Amortization of prior service cost	4,240			5,183				4,867
Recognized actuarial loss	13,195			13,896				13,890
Recognized settlement loss	146			—			—	206
Total pension cost	5,558			8,420				12,096
Less: amounts capitalized	845			1,187				1,403
Amount charged to expense	$	4,713		$	7,233			$	10,693
Rates relevant to each year’s expense calculations:
Discount rate – defined benefit pension plan	4.29		%	4.42		%		4.06		%
Discount rate – supplemental retirement plan	4.00		%	4.19		%		3.82		%
Expected return on defined benefit pension plan assets	6.75		%	6.75		%		6.75		%
Expected return on supplemental retirement plan assets	6.75		%	6.75		%		6.75		%

Schedule Of Asset Allocation Guidelines

The following table summarizes the Company’s target pension plan allocation for 2017:



Asset Category:	Target Allocations
Equity Securities	30%
Debt Securities	70%

Schedule Of Fair Value Of Pension Plan Assets



	Fair Value Measurements at
	December 31, 2017
	(in thousands)
			Quoted Prices in Active Markets for Identical Assets		Significant Observable Inputs
Asset Category	Total		(Level 1)		(Level 2)		%
Short-term investments	$	115	$	115	$	—	—	%
Mutual funds:
U.S. equities	162,144		162,144		—		22	%
International equities	58,536		58,536		—		8	%
Fixed income	415,868		415,868		—		56	%
Fixed income securities:
U.S. Treasury securities	102,284		102,284		—		14	%
Total	$	738,947	$	738,947	$	—	100	%



	Fair Value Measurements at
	December 31, 2016
	(in thousands)
			Quoted Prices in Active Markets for Identical Assets		Significant Observable Inputs
Asset Category	Total		(Level 1)		(Level 2)		%
Short-term investments	$	78	$	78	$	—	—	%
Mutual funds:
U.S. equities	329,877		329,877		—		49	%
International equities	58,833		58,833		—		9	%
Fixed income	230,926		230,926		—		34	%
Fixed income securities:
U.S. Treasury securities	54,716		54,716		—		8	%
Total	$	674,430	$	674,430	$	—	100	%

Schedule Of Expected Benefit Payments

Expected benefit payments are expected to be paid out of the Pension Plans as follows:



Year	Pension Benefits
	(In Thousands)
2018	$	40,598
2019	$	42,325
2020	$	43,657
2021	$	45,077
2022	$	46,030
2023 through 2027	$	237,296

Indianapolis Power And Light Company [Member]

Entity Information [Line Items]